php socket 超时设置

1、php创建socket的方法和设置超时的方法，贴出来分享一下

 //如果$waitAckSec=0，则返回成功发送的字节�?
     //如果$waitAckSec大于0，则返回发送后接收到得内容
     //任何情况下，失败都返回FALSE
     function sendUdp($host, $port, $buff,$waitAckSec=0) {
         $socket = ($result = @socket_create(AF_INET,SOCK_DGRAM,SOL_UDP));
         //发送超时1秒
         socket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO,array("sec"=>3, "usec"=>0 ) );
         //接收超时6秒
         socket_set_option($socket,SOL_SOCKET,SO_SNDTIMEO,array("sec"=>6, "usec"=>0 ) );
         if($socket){
             $result = @socket_sendto($socket,$buff,strlen($buff),0,$host,$port);
             if($waitAckSec>0){
                 $result = FALSE;
                 $read = array($socket);
                 $write = NULL;
                 $except = NULL;
                 if(@socket_select($read,$write,$except,$waitAckSec)>0){
                     $fromHost = "";
                     $fromPort = 0;
                     @socket_recvfrom($socket,$result,4096,0,$fromHost,$fromPort);
                     $result = phpext_unpack($result);
                     if($result["needAck"] == 1){
                         $this->sendUdp($host, $port, $result["ackdata"]);
                         if(isset ($result['data']['list']) && isset ($result['data']['totalCount'])){
                             $list = $result['data']['list'];
                             $count = $result['data']['totalCount'];
                             while($count>  count($list)){
                                 @socket_recvfrom($socket,$result_temp,4096,0,$fromHost,$fromPort);
                                 $result_temp = phpext_unpack($result_temp);
                                 $this->sendUdp($host, $port, $result_temp["ackdata"]);
                                 $list = array_merge($list,$result_temp['data']['list']);
                             }
                             $result['data']['list'] = $list;
                         }
                     }else{
                         @socket_recvfrom($socket,$result,4096,0,$fromHost,$fromPort);
                         $result = phpext_unpack($result);
                         if($result["needAck"] == 1){
                             $this->sendUdp($host, $port, $result["ackdata"]);
                             if(isset ($result['data']['result']) && isset ($result['data']['userID'])){
                                 $list = $result['data']['list'];
                                 $count = $result['data']['totalCount'];
                                 while($count>  count($list)){
                                     @socket_recvfrom($socket,$result_temp,4096,0,$fromHost,$fromPort);
                                     $result_temp = phpext_unpack($result_temp);
                                     $this->sendUdp($host, $port, $result_temp["ackdata"]);
                                     $list = array_merge($list,$result_temp['data']['list']);
                                 }
                                 $result['data']['list'] = $list;
                             }
                         }
                     }
                 }else{
                     $result = SEND_UDP_ERROR;
                 }
             }
             @socket_close($socket);
         }
         return $result;
     }